MemoryThe GPU accesses a 4GB frame buffer of Fast GDDR5, through a 128-bit memory interface, while the Memory Clock Operates at 1750MHz.

Power ConsumptionWith a rated board TDP of 75W, it requires at least a 350W PSU and relies entirely on the PCI Slot for Power, meaning no Extra Connectors are required.

PerformanceThis graphics card was designed and marketed towards the competitive MOBO gamers. A light weight, small form factor GPU solution that offers mobility, so that gamers travelling to events can bring a smaller cheaper gaming rig. The Radeon RX 460 4GB can play most modern games at medium graphics selection on a 1600p screen res and expect around 45+FPS

System SuggestionsRadeon RX 460 4GB is best suited for resolutions up to and including 1600x900. We recommend a Performance Processor and 8GB of RAM for Optimal Performance.

If you only have money for RX 460 go and buy it .. its the best option for under 140$ .. buy 2GB variant cuzz theres no real difference between 2GB and 4GB .. RX 460 is to slow to fully utilize 4GB Vram and stay above 45-50 fps .. but if you have little more money, go for RX 470 !! Its much better value for money .. But i think on 900p you'll be fine with RX 460 2GB :)